The New York Knicks beat the Boston Celtics 121-113 in Game 4 of the Eastern Conference Semifinals, and are now up 3-1. Colin Cowherd discusses whether or not the series is over.

The Boston Celtics lost Game 4 and saw Jayson Tatum suffer a potentially serious injury on Monday night against the New York Knicks. The Knicks won 121-113 thanks to a strong second half and erased another large deficit,

On the other side of the court, Jayson Tatum put together a strong performance before going down with a serious lower leg injury. Many believe that Tatum tore his Achilles after scoring 42 points on 16-for-28 shooting to go along with eight rebounds, four assists, four steals, and two blocks.

The Boston Celtics and New York Knicks will meet for a Game 4 Eastern Conference semifinals matchup tonight in New York City.

For Boston fans, if Tatum's injury is as bad as it looks, awful isn't emphatic enough of a descriptor for this loss.

Down by 14 points in the third quarter of Game 4, the Knicks came roaring back for another improbable, instant-classic victory over the defending champion Boston Celtics.